Combine figs, honey, water, butter, lemon juice, cinnamon, vanilla, cloves, salt, and ginger in a large pot; bring to a boil. Reduce heat and simmer until figs are soft, about 1 hour 15 minutes.
Blend fig mixture with an immersion blender until jam reaches desired consistency. Stir in walnuts. Continue cooking until flavors combine, about 15 minutes.
Remove the pot from heat and pour jam into a container. Store in the refrigerator for up to one month.